codingan NetBeans untuk membuat login

Desain Login

Keterangan :

•  Untuk kolom Nama kalian menggunakan Text Field.
•  Untuk kolom Password kalian menggunakan Password Field.
•  Untuk tombol login dan keluar kalian menggunakan Button.

Setelah kalian membuat desain login 

- Langkah awal kalian harus klik kanan pada Text Field, dan Button satu per-satu tidak boleh berbarengan..

- Setelah itu pilih Change Variable Name...

- Lalu ubah nama menjadi :

Text Field : nama
Password Field : password
Button : login
Button : keluar

Dibawah ini adalah Codingan Login

1. /*
2.  * To change this license header, choose License Headers in Project Properties.
3.  * To change this template file, choose Tools | Templates
4.  * and open the template in the editor.
5.  */
6. package biodata_siswa;
7. 
   
8. /**
9.  *
10.  * @author Rei Fandi
11.  */
12. public class desaignlogin extends javax.swing.JFrame {
13. 
    
14.     /**
15.      * Creates new form desaignlogin
16.      */
17.     public desaignlogin() {
18.         initComponents();
19.     }
20. 
    
21.     /**
22.      * This method is called from within the constructor to initialize the form.
23.      * WARNING: Do NOT modify this code. The content of this method is always
24.      * regenerated by the Form Editor.
25.      */
26.     @SuppressWarnings("unchecked")
27.     // <editor-fold defaultstate="collapsed" desc="Generated Code">                          
28.     private void initComponents() {
29. 
    
30.         jLabel1 = new javax.swing.JLabel();
31.         jLabel2 = new javax.swing.JLabel();
32.         jLabel3 = new javax.swing.JLabel();
33.         nama = new javax.swing.JTextField();
34.         login = new javax.swing.JButton();
35.         keluar = new javax.swing.JButton();
36.         password = new javax.swing.JPasswordField();
37. 
    
38.         setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
39. 
    
40.         jLabel1.setFont(new java.awt.Font("Tempus Sans ITC", 1, 18)); // NOI18N
41.         jLabel1.setText("\" Login \"");
42.         jLabel1.setAlignmentY(10.0F);
43.         jLabel1.setCursor(new java.awt.Cursor(java.awt.Cursor.DEFAULT_CURSOR));
44. 
    
45.         jLabel2.setText("Nama :");
46. 
    
47.         jLabel3.setText("Password :");
48. 
    
49.         login.setText("Login");
50.         login.addActionListener(new java.awt.event.ActionListener() {
51.             public void actionPerformed(java.awt.event.ActionEvent evt) {
52.                 loginActionPerformed(evt);
53.             }
54.         });
55. 
    
56.         keluar.setText("Keluar");
57.         keluar.addActionListener(new java.awt.event.ActionListener() {
58.             public void actionPerformed(java.awt.event.ActionEvent evt) {
59.                 keluarActionPerformed(evt);
60.             }
61.         });
62. 
    
63.         javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
64.         getContentPane().setLayout(layout);
65.         layout.setHorizontalGroup(
66.             layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
67.             .addGroup(layout.createSequentialGroup()
68.                 .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
69.                     .addGroup(layout.createSequentialGroup()
70.                         .addGap(24, 24, 24)
71.                         .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
72.                             .addComponent(jLabel3)
73.                             .addComponent(jLabel2)
74.                             .addComponent(login, javax.swing.GroupLayout.PREFERRED_SIZE, 79, javax.swing.GroupLayout.PREFERRED_SIZE))
75.                         .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
76.                             .addGroup(layout.createSequentialGroup()
77.                                 .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
78.                                 .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
79.                                     .addComponent(nama, javax.swing.GroupLayout.DEFAULT_SIZE, 136, Short.MAX_VALUE)
80.                                     .addComponent(password)))
81.                             .addGroup(layout.createSequentialGroup()
82.                                 .addGap(24, 24, 24)
83.                                 .addComponent(keluar, javax.swing.GroupLayout.PREFERRED_SIZE, 87, javax.swing.GroupLayout.PREFERRED_SIZE))))
84.                     .addGroup(layout.createSequentialGroup()
85.                         .addGap(127, 127, 127)
86.                         .addComponent(jLabel1)))
87.                 .addContainerGap(155, Short.MAX_VALUE))
88.         );
89.         layout.setVerticalGroup(
90.             layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
91.             .addGroup(layout.createSequentialGroup()
92.                 .addContainerGap()
93.                 .addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 43, javax.swing.GroupLayout.PREFERRED_SIZE)
94.                 .addGap(17, 17, 17)
95.                 .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
96.                     .addComponent(jLabel2)
97.                     .addComponent(nama, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
98.                 .addGap(18, 18, 18)
99.                 .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
100.                     .addComponent(jLabel3)
101.                     .addComponent(password, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
102.                 .addGap(27, 27, 27)
103.                 .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
104.                     .addComponent(login)
105.                     .addComponent(keluar))
106.                 .addContainerGap(121, Short.MAX_VALUE))
107.         );
108. 
     
109.         pack();
110.     }// </editor-fold>                        
111. 
     
112.     private void loginActionPerformed(java.awt.event.ActionEvent evt) {                                      
113.         // TODO add your handling code here:
114.         String user = "laras";
115.             String pas = "12345";
116.             String username = nama.getText();
117.             String pasword = password.getText();
118.             if (nama.equals(nama)&&password.equals(password)){
119.                    this.setVisible(false);
120.                    new projectbiodata()(nama data yang akan kalian panggil).setVisible(true);
121.             } else {
122.                 javax.swing.JOptionPane.showMessageDialog(null, "Maaf user bame atau" +"Password anda salah");
123.                 nama.setText("");
124.                 password.setText("");
125.                 nama.requestFocus();
126.             
127.             }
128.     }                                     
129. 
     
130.     private void keluarActionPerformed(java.awt.event.ActionEvent evt) {                                       
131.         // TODO add your handling code here:
132.         System.exit(0);
133.     }                                      
134. 
     
135.     /**
136.      * @param args the command line arguments
137.      */
138.     public static void main(String args[]) {
139.         /* Set the Nimbus look and feel */
140.         //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
141.         /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
142.          * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html 
143.          */
144.         try {
145.             for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
146.                 if ("Nimbus".equals(info.getName())) {
147.                     javax.swing.UIManager.setLookAndFeel(info.getClassName());
148.                     break;
149.                 }
150.             }
151.         } catch (ClassNotFoundException ex) {
152.             java.util.logging.Logger.getLogger(desaignlogin.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
153.         } catch (InstantiationException ex) {
154.             java.util.logging.Logger.getLogger(desaignlogin.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
155.         } catch (IllegalAccessException ex) {
156.             java.util.logging.Logger.getLogger(desaignlogin.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
157.         } catch (javax.swing.UnsupportedLookAndFeelException ex) {
158.             java.util.logging.Logger.getLogger(desaignlogin.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
159.         }
160.         //</editor-fold>
161. 
     
162.         /* Create and display the form */
163.         java.awt.EventQueue.invokeLater(new Runnable() {
164.             public void run() {
165.                 new desaignlogin().setVisible(true);
166.             }
167.         });
168.     }
169. 
     
170.     // Variables declaration - do not modify                     
171.     private javax.swing.JLabel jLabel1;
172.     private javax.swing.JLabel jLabel2;
173.     private javax.swing.JLabel jLabel3;
174.     private javax.swing.JButton keluar;
175.     private javax.swing.JButton login;
176.     private javax.swing.JTextField nama;
177.     private javax.swing.JPasswordField password;
178.     // End of variables declaration                   
179. }

NOTE : Nomer 27 - 111 dan 140 - 168 jangan terlalu diperhatikan ya guys soalnya disana tidak terlalu penting

jdi kalian harus memperhatikan nomer 6,12,17,18 dan 112-133 saja ya...dari pada kalian pusing melihat tulisan semua kan kgk asik :) wkwk. Dan satu lagi jika ada tulisan berwarna merah jangan diketik ya guys itu bukan codingan tetapi pernyataan :)

" Semoga Bermanfaat "